Hello,
I have a VM (ID 125) running WHM/cPanel. When creating it, I accidentally placed the disk on my NAS Backup storage instead of local storage (local_btrfs).
Symptoms / Issues:
qemu-img: error while reading at byte 21696741376: Input/output error
Logs / Info:
Questions:
Any advice is highly appreciated.
I have a VM (ID 125) running WHM/cPanel. When creating it, I accidentally placed the disk on my NAS Backup storage instead of local storage (local_btrfs).
Symptoms / Issues:
- The VM sometimes shuts down automatically after starting.
- Inside the VM, dmesg shows repeated I/O errors on /dev/sda.
- Attempts to move the disk to local storage via GUI (Disk → Move Storage) fail consistently around 21 GB:
qemu-img: error while reading at byte 21696741376: Input/output error
- Backups via PBS also fail with Input/output error (job stops at ~20 GB).
Logs / Info:
- Proxmox logs show VM 125 starts normally, no host-side shutdowns.
- NAS disk path: NAS-BACKUP:125/vm-125-disk-0.qcow2
- VM disk size: 1 TB
- Old backups exist but are too outdated to restore. (can't use the backup)
Questions:
- What is the safest way to recover or move this VM disk to local storage without losing data?
- Are there any recommended steps to prevent VM crashes while trying recovery?
Any advice is highly appreciated.